case-converter

Zero-dependency utility to convert strings between all common case formats.

Features

• 🔄 8 case formats supported
• 🔍 Automatic case detection
• 🌍 Accent removal (héllo → hello)
• 🔢 Digit-aware tokenization (hello2World → hello2_world)
• 📦 Zero dependencies
• 🟦 TypeScript types included
• ⚡ Works in Node.js (ESM & CJS)

Install

npm install case-converter

Usage

import {
  toCamelCase,
  toPascalCase,
  toSnakeCase,
  toKebabCase,
  toConstantCase,
  toDotCase,
  toTitleCase,
  toFlatCase,
  detectCase,
  convertCase,
} from 'case-converter';

Converters

| Function | Input | Output | |-------------------|-----------------|-----------------| | toCamelCase | hello world | helloWorld | | toPascalCase | hello world | HelloWorld | | toSnakeCase | hello world | hello_world | | toKebabCase | hello world | hello-world | | toConstantCase | hello world | HELLO_WORLD | | toDotCase | hello world | hello.world | | toTitleCase | hello world | Hello World | | toFlatCase | helloWorld | hello world |

All converters accept any input format:

toCamelCase('hello_world')   // 'helloWorld'
toCamelCase('hello-world')   // 'helloWorld'
toCamelCase('HelloWorld')    // 'helloWorld'
toCamelCase('héllo wörld')   // 'helloWorld'
toCamelCase('hello2World')   // 'hello2World'

detectCase(str)

Detect the case format of a string:

detectCase('helloWorld')   // 'camel'
detectCase('HelloWorld')   // 'pascal'
detectCase('hello_world')  // 'snake'
detectCase('hello-world')  // 'kebab'
detectCase('HELLO_WORLD')  // 'constant'
detectCase('hello.world')  // 'dot'
detectCase('Hello World')  // 'title'
detectCase('hello world')  // 'flat'
detectCase('???')          // 'unknown'

convertCase(str, to)

Convert from any format to a target format:

convertCase('hello_world', 'camel')     // 'helloWorld'
convertCase('helloWorld',  'kebab')     // 'hello-world'
convertCase('hello world', 'constant') // 'HELLO_WORLD'

Valid target values: 'camel', 'pascal', 'snake', 'kebab', 'constant', 'dot', 'title', 'flat'

ESM & CommonJS

You don't have to choose — Node.js picks the right format automatically based on your project setup thanks to the npm run build command.

// Modern project (ESM) — package.json has "type": "module"
import { toCamelCase } from 'case-converter';

// Older project (CJS) — default Node.js setup
const { toCamelCase } = require('case-converter');

Both work out of the box, no configuration needed.

License

MIT